Solution

app/main.py

@@ -1 +1,40 @@
-# write your code here
+class Animal:
+
+    alive = []
+
+    def __init__(
+            self,
+            name: str,
+            health: int = 100,
+            hidden: bool = False
+    ) -> None:
+        self.name = name
+        self.health = health
+        self.hidden = hidden
+
+        Animal.alive.append(self)
+
+    def die_animal(self) -> None:
+        Animal.alive.remove(self)
+
+    def __repr__(self) -> str:
+        return (f"{{Name: {self.name}, "
+                f"Health: {self.health}, "
+                f"Hidden: {self.hidden}}}")
+
+
+class Herbivore(Animal):
+
+    def hide(self) -> None:
+        self.hidden = not self.hidden
+
+
+class Carnivore(Animal):
+
+    def bite(self, herbivore: Animal) -> None:
+        if isinstance(herbivore, Herbivore):
+            if not herbivore.hidden:
+                herbivore.health -= 50
+
+        if herbivore.health <= 0:
+            herbivore.die_animal()